Abstract: A cornea-borne image and light display device (10) comprising a pair of scleral-rider devices (10), (20) similar to contact lenses, which mount on the corneas of the viewer's eyes to present images within the viewer's eyes. The images to the devices is supplied through a respective fiber-optic bundle (14), (16) that derives its light from a light projector (12). Two embodiments are presented, in one, the fiber-optics directly transmit the light source from the projector (12), in the second the optic fibers reflect the light from a plurality of mirrors embedded within the device.

Abstract: An instrument and technique is disclosed for locating the exit point of the visual axis at the corneal surface. Several methods are described. One includes an optical device movable on the corneal surface and being partially reflective and transparent to incident light. A collimated light beam is directed along the axis through the device onto the retina of a patient's eye, and a viewing means is provided for observing a light beam reflected from the device along the incident axis when the eye fixates on the collimated beam. The invention can also be implemented for direct visualization without the optical device, by off-axis viewing of scattered light produced by the incident collimated beam impinging on the corneal tissue, or by viewing fluorescent radiation from the point of intersection of the incident beam produced by a fluorescent dye applied to the cornea.

Abstract: Disclosed are a system and a method for stabilizing the image of an object when the motions of that object are small, the motions are either rotatory or straight-line, and the object can be contacted. In the case of the eye a contact element structure contacts the eye and moves with the small rotational movements of the eye. The contact element is mounted to rotate about a pivot point which is outside the eye. The device forms a virtual image of a portion of the eye; this image is stabilized in that the virtual image does not move laterally with the small eye movements. The examining instrument, e.g., a biomicroscope, is focused on the virtual image. In laser treatment of the retina or other regions of the eye the laser beam can be directed through the system to the stabilized image.

Abstract: A laser iridotomy sphincterotomy contact lens having a high-power (103 diopter) entry lens decentered 2.5 millimeters from the contact lens. Very small iris focal spots and high-energy density are practically achievable.

Abstract: A method for evaluating the in vivo ability of a contact lens to become or remain wet includes the steps of supporting the subject's head to determine a fixed orientation of the lens, illuminating the lens with coherent light, imaging the pre-lens tear film in a manner to form an interference pattern, recording in a time sequence manner the image formed thereby, and determining the tear film thickness by correlating the interference bands of the recorded image. The classical contact angle is derived, and other measures, such as the time interval from blink until the onset of the tear film breakup, or the time until the film evaporates, and the initial or average film thickness are derived. In addition, the nature and evolution of localized dry spots may be directly observed, clarifying the causes of tear film breakdown on worn contact lenses.

Abstract: An ophthalmic lens utilized for observing the fundus of an eye using through the lens illumination and for delivering a focused laser beam to the fundus includes a contact lens and an aspheric entry lens. In combination, the lenses provide an aerial image of the fundus anterior to the entry lens.

Abstract: The invention concerns a contact lens for observation or treatment by irradiation of the eye, in particular the anterior chamber, outside of the optical axis of the eye. The contact lens comprises a Goldmann or Roussel lens having an entrance face which is flat or spherical, a spherical exit face which is applied to the cornea of the eye, a reflecting face and a compensating element, for example a plano-cylindrical lens. The compensating element is fixed on the reflecting face and its function is to create an astigmatism effect which is the reverse of that of the eye, for an incident light beam which enters by way of the entrance face. The contact lens permits highly accurate focusing of the beam on the apex inside the eye, which is particularly useful in ophthalmoscopy and ophthalmotherapy by means of a laser beam.

Abstract: A contact lens arrangement is described for optically examining an eye and/or treating it by light irradiation, in particular the retina, in the region of or away from the optical axis of the eye.The contact lens arrangement comprises a Goldmann lens having a plane entry surface and a spherical exit surface, applied to the cornea of the eye, and a compensating element, e.g. a prism, having an entry surface. The compensating element is fixed to the entry surface of the Goldmann lens and its function is to produce an astigmatism opposite to that of the eye with an incident light beam, entering through its entry surface.This contact lens arrangement enables very accurate focusing of the beam on to a particular point inside the eye.

Abstract: A self-adherent corneal contact lens which is placed on the cornea of an eye for viewing the interior of the eye, as during clinical diagnoses of the eye and eye surgery. The lens has a central optical zone for viewing the posterior chamber of the eye, a curve peripheral flange for viewing the periphery of the posterior chamber, the flange terminating in an edge having a non-optical bevel engageable with the cornea of the eye for holding the lens in substantially stationary position on the eye. The central optical zone has a negative diopter power and the curved peripheral flange has a positive diopter power.

Abstract: Fluorescence of the anterior chamber of an eye is determined by projecting a ribbon of light from the side of the eye through the anterior chamber in a direction generally perpendicular to the optic axis of the eye. The ribbon of light is obtained by imaging the face (20) of a fiber optic bundle (18) and directing that image into the anterior chamber by a mirror (30) mounted adjacent to a contact lens (40). The contact lens (40) includes a flexible membrane (14) backed by a fluid. The pressure of the fluid can be varied by a syringe (44) to vary the curvature of the contact lens membrane (14). The fluorescence can be detected either directly by a photodiode (68) or through a fiber optic bundle (34) by a photomultiplier (76).

Abstract: A goniotomy lens includes a truncated generally pyramidal body having four reflective sides, a concave smaller end face and an angled larger upper end face. The angled upper end face permits a standard operating microscope of be utilized since light produced by the microscope is reflected off-axis from the surface to minimize glare. The smaller end face has a curvature of approximately 43 diopters in order to sealing mate with the human eye. The reflective sides of the lens enable the angle of the anterior chamber to be viewed during a goniotomy. The ratio of the height of lens to the width of its base is advantageously less than 2 and most advantageously approximately 1.

Abstract: A laser canaliculostomy eye-treatment method and device for promoting drainage of aqueous humor from the anterior chamber. According to one manner of practicing the invention, blood exiting the Canal of Schlemm is blocked by rim pressure applied externally to the eye to engorge the Canal with blood--thus to shift the Canal's apparent color toward that of blood. With engorgement established, a laser beam is directed in a pulse to create a fluid drainage passage connecting the anterior chamber and the Canal. According to another way of practicing the invention, the two steps just mentioned are preceded by preliminary use of a similar laser beam to create a small "passage-starting" crater in the trabecular meshwork adjacent the Canal at the location where the final passage is intended to lie. A device for facilitating blood engorgement of the Canal of Schlemm includes a Goldman lens receiving portion and a flange which produces pressure on the eye, restricting the flow of blood in the Canal.

Abstract: A contact lens for use in the observation of the interior of an eyeball in ophthalmological examination; the contact lens having one surface for placement in contact with the eyeball and illuminating means movably mounted adjoining another surface of the lens for illuminating the interior of the eyeball.

Abstract: The invention concerns contact lenses for observation or irradiation of the eye. The contact lens contains, for useful radiation, an entry face (1), a surface (2) reflecting by total reflection and an approximately spherical exit surface (3). Entry face (1) constitutes a wave surface for useful radiation.

Abstract: The contact lens (1) for observation and treatment by a coherent radiation beam of a working point T of the eye comprises, for example, an entry lens (4) coupled to a contact lens (5) designed to be applied to the cornea of the eye, the optic axes (6) of said lenses being merged. The entry surface of the lens is spherical and is associated with Weierstrass points A and A' and the image of point A' by the rest of the contact lens is merged with said working point T.

Abstract: A method and apparatus is disclosed for continuously monitoring hemoglobin saturation in the blood of premature infants. A substantial portion of the eye fundus is illuminated by passing at least two frequencies of light through the pupillary opening. The light scattered from the fundus is collected as it passes out through the pupillary opening and its intensity is measured. Calculations known in the art are used to determine blood hemoglobin based on the intensity of the scattered light. A contact lens with associated fiber optic links is used to illuminate the infant eye and to collect the scattered light.

Abstract: A contact glass with two reflecting surfaces for observing the chamber angle of a human eye in proximity of the iris, with a reflecting surface arranged laterally of the eye to be examined and a central reflecting surface to be located in the area of the common optical axis of the eye and of the axis of the contact glass; the path of observation rays is guided from the eye of the observer to the central reflecting surface and from the latter by way of the lateral reflecting surface into the interior of the eye whereby the lateral reflecting surface is so arranged to the common axis that its plane intersects the eye to be examined outside of the corneal area thereof and extends toward the eye to be examined up to a point to the rear of the center tangent of the eye abutment surface of the contact glass.

Abstract: A method of reducing the effects of rotational motion and jitter of an object comprising forming a virtual image of the region or plane being examined at the center of rotation of the object by means of a lens or mirror fixed with respect to the object and viewing the virtual image of the region or plane. An optical system for viewing a region or plane of an object adapted to reduce the effects of rotational motion and jitter of the object by providing a virtual image of the region or plane at the center of rotation of the object. Image stabilization apparatus comprising an optical instrument for viewing a plane or region of an object and means rigidly affixed to the object for forming a virtual image of the plane or region substantially at the center of rotation of the object as the plane or region is viewed through the optical instrument.

Abstract: An adaptor for use with an objective lens in an ophthalmological microscope comprises of an eyepiece member having an aperture defined therein for containing an impregnating liquid having a refractive index intermediate those of the objective lens and the cornea to be observed and a collar member for supporting said eyepiece member in fixed relation to the objective lens. The improvements wherein said collar member has a passage through which said impregnating liquid is adapted to be introduced into said aperture.